Handle for portable incandescent lamps



July 3, 1928. 1,675,763

c. T. MCCARTHY HANDLE FOR PORTABLE INCANDESCENT LAMPS Filed April 25,1927 Carhifi/eww@ lll " the lamp socket.

Patented July 3, 1928.

UNITED STATES 1,675,763 PATENT OFFICE.

CHARLES MCCARTHY, OF SOUTH WEYMOUTH, MASSACHUSETTS, ASSIGNOR- OF 0NE-HALF TO EDWARD R. HARTON, OF MEDFORD, MASSACHUSETTS.

HANDLE FOR PORTABLE INCANDESCENT LAMPS.

Application led April 25, 1927. Serial No. 186,242.

This invention relates to an incandescentlamp supplied with current bycircuit wires enclosed in an insulating sheath, the wires and vsheathconstituting an elongated flexible cable, one end of which is connectedy with the inner end of the lamp socket. The connection of theinsulating material of the cable with t-he lamp socket is liable to bepulled away from the socket by relative twisting or turning movements ofthe handle and socket and longitudinal strain on the cable.

It is customary to provide a portable lamp with a tubular hand gripwhich receives the lamp socket and the portion of the cable connectedwith the socket.

One object of the invention is to provide a handle which is adapted tobe compressed upon and firmly gri the cable, and thereby preventliability of etaching the cable wires from the lamp socket bylongitudinal strain exerted on the cable, as when it is being draggedover a floor.

Another object is to enable the handle to be interengaged with aprojection on the inner end of thelamp socket, so that neither can beturned independently of the other, and thereby prevent liability ofdetaching the wire from the socket by twisting strains.

The general object is to permit the engagement of the handle with thesocket and cable in such manner as to obviate liability of accidentalseparation of the circuit wires from the socket.

Of the accompanying drawings forming a part of this specification,-

Figure 1 is a side elevation, showing my improved handle. applied to thesocket and cable of an incandescent electric lamp.

Figure'2 is a View similar to Figure 1, the wire guard shown by Figure1, and the handle being shown in longitudinal section.

Figure 3 is an end view of the handle. and shows by dotted lines theinner end of Figure 4 is a section on line 4-4 of Figure 3.

Figures 5, 6 and 7, are elevations showing the lamp socket as viewedfrom diii'erent points.

yThe same reference characters indicate the same parts in all of thefigures.

In the drawings, 12 designates an electric lamp socket adapted, lasusual, for engagement with a lamp bulb 13. The socket is of common formused in portable lamps, and has at its inner end the usual oblongprojection 14, the form and arrangement ot which is shown by Figures 3,6, and 7, and by dotted lines in Figure 3. The holes 15 in the socketare for the reception of the usual conducting wires 16, extendingthrough the insulating sheath 16a said wires and sheath constituting acable which may be of any desired length. The portions of the Ywiresemerging;fromv the inner' end of the sheath extend lthrough the holes15. The portions of the wires extending into the holes 15 constitute theonly means for connecting the cable with the lamp socket.

My improved vhandle is adapted for engagement with the projection 14 ofthe lamp socket, to prevent the turning of the handle on the socket andthe twisting of the wires where they enter the holes 15. The handle isalso adapted to be compressed on and rmly grip the cable, to prevent theend portions ot' the wires from being pulled out of the holes 15 by alongitudinal strain exerted on the cable when a considerable lengththereof is dragged on a floor or the ground, while the handle and lampare being moved from place to place.

The handle is tubular and preferably turned by a lathe from a block ofwood. The handle comprises an elongated grip portion 18, having alongitudinal bore, and an enlarged head portion 19. The bore of the gripportion is formed to receive the cable, so that after the cable isconnected in the usual manner with the lamp socket 1,2, it may bethreaded through the handle. The head 19 has a recess 20. formed toreceive the lamp socket 12. In the inner end wall of the recess aretransverse slots 21, arranged to receive the projection 14 on the innerend of the lamp socket, as shown by Figure 2, and by dotted linesinFigure 3, the projection engaging the sides of the slots and preventingthe handle from turning relative to the socket 12 and the cable.

The grip portion 18 is provided with longitudinal slots 22.v renderingits outer end compressible. The handle includes a clamp 23 of anysuitable construction, embacing the slotted portion and adjustable topermit the edges of the slots 22 to spring apart, asshown by Figure 4,and to approach each other, as shown by Figure 1. When thel clamp iscontracted, the outer end of the handle i bore i grips the cable and(prevents endivise vmovement thereof, relative fte the lhandle and lamp'socket, so that there-is no liability of. the pullingoffthe WiresOut-OTE 5 the socket. AThe SlotsQQ:arepreferably--`\/- shaped7 theirsides meeting` at the inner vends olf' the elote. This fiorite 11e-`m1..ts=ftlie .fslot Vedges to Close together, as shown by Figure l,whenV the slotted portion zrisV eoinpreefsed.V 10 24 designates a Wirecage, which may have asplit neel; v25,'embracinga groove'zZG in thesocket 12, `and confined in the Ygroove by the headi-lQ?1 the outer endof which 'overlaps Ythe groove,

l. A handleadapted for engagement with a. portable electric lainpsocket, and'vvith a 'flexiblecenductingoahle connected with the socket,said 'handle comprising' van elongated d20 tuhular'rgr-ip portion whosebore is -forined to reeeiver't-he cable, and -anv enlarged head`portion-'havinga'recess formedA to lreceive theylamp socket, the gripportion havingl longitudinal slots rendering `its Vouter end ifcompressible,-so that its bore is Vadapted to f Y grip Ythe cahleVand-llprevent the separation ltn-d-ina-lly' slotted portion and adaptedto rin-aint-aingthe same eoinpressed on the cable.

Vceive a projection on'the inner `-end of Vthe ofthe cable from thesocket, the `handle comprising-also a clamp embracing the longi- Q. Ahandle adapted: 'for engagement VWith a portable electric lamp socket,and With a' exihleeondncting'cable Yconnectedy With the socket saidhandle coin arisinfr an elono'ated tubular-grip portion Whose here isformed 3 to receive the cable, and an enlarged headv lportion having arecessiormed' to `:receive the lamp socket, the inner end- Wallbf'there# cess having' transverse slots arranged toresocket and prevent thehandle 'from turning on the socket and cable, Athe grip portion havin 0"lone'itu'dinal Slots renderine itsoiiter 2j D fsignatur-e. Y y

CHARLES iMoG-ARTHY.

